Question PWR_OK with +5VSB accidentally

Nov 3, 2020
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I just brought new corsair CV550
And I test it by connecting PS_ON to COM on 24 pin connector.
Then again during rgb fan test. I accidentally hold 24 pin connector inverted.
And made another connection
+5VSB with PWR_OK
I got 1 rgb blink.
Like something shorted
Then I did correct check and psu is still working.

Can anyone tell me what happened during wrong connection?
RGB seems to be still working with psu and psu fan is also spinning
I don't have motherboard yet.

I just want to make sure that what I bought is still working perfectly.
 

jay32267

Illustrious
The PWR_OK terminal is a terminal that goes to 5 volts when the PSU essentially passes a self test.

By connecting the +5V to it....you are connecting an output to an output.

This isn't proper.

I think it's possible to have damaged the PWR_OK circuit....but also...you may not have.

The only way to know is to try it on a motherboard....or use a voltmeter on the PWR__OK....and it should go to 5V not long after you power on the PSU.
 
Reactions: Nuke7777
Nov 3, 2020
19
0
10
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I have the multimeter.
Now how should I check?
Should I connect positive terminal to PWR_OK and negative to COM.for voltage setting.Right.?
And also
Do I need to keep PS_ON connected with COM while doing this?
 
Last edited:

jay32267

Illustrious
I have the multimeter.
Now how should I check?
Should I connect positive terminal to PWR_OK and negative to COM.for voltage setting.Right.?
And also
Do I need to keep PS_ON connected with COM while doing this?
Have the meter on PWR_OK and COM.....the red lead goes on PWR_OK to read positive voltage.
Then jump start the supply like you normally do....by connecting PS_ON to COM .
The meter should go to 5V pretty shortly after.
 
Reactions: Nuke7777
Nov 3, 2020
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Yes I know about multimeter.
But, this time It didn't even run.
I means, it was working even after acciden for quite a while.
I ran rgb fan rgb case on it for like an half an hour few hours ago.
But, now fan doesn't spin.
Also
Screws doesn't fit even without case. ( Seems like manufacturing defect)
Even if it work, it won't fit properly.
So there is no point doing effort.
I will just replace it.
Thanks for help though.
 

jay32267

Illustrious
Yes I know about multimeter.
But, this time It didn't even run.
I means, it was working even after acciden for quite a while.
I ran rgb fan rgb case on it for like an half an hour few hours ago.
But, now fan doesn't spin.
Also
Screws doesn't fit even without case. ( Seems like manufacturing defect)
I will just replace it.
Thanks for help though.
You're welcome.
It's possible something got damaged....but that doesn't explain why it ran afterwards.
The meter should NOT be affecting anything. If you have it set to DC volts the meter is virtually invisible from an electrical standpoint.
 
Reactions: Nuke7777
Nov 3, 2020
19
0
10
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I just got replacement.
And I tested new.
It wasn't working either.
Did some troubleshooting
Turns out some of the indian electrical sockets are not very friendly with square ended pin.
I Changed the socket and psu worked
Probably the last psu was also working 😂
Although one screw still doesn't go through.
Maybe seller has defective lot.
I will be using only three screws only 😅
https://ibb.co/Lz8gX4s
 

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